I see there are many before and after shots in one step. So I decided to make a short video video clip of a before & after, stage by stage in smooth transition. When i first show the raw clip to people, nobody noticed anything until the very end with a side by side comparison. Find it interesting people's perception can be manipulated or tricked. Here is my short clip on Youtube:

https://youtu.be/VWcM4kqaQB4

Ok, I did stage by stage instead of step by step to make the clip shorter. I'm sure you all know that there are many more small steps than the general stages described. And yes, there were layers blending and masking involved. I'm sure you all know that.